Cops arrested a man suspected of fatally beating and robbing a Hell’s Kitchen man in his own apartment, police said Friday.

Rodney Brown, 49, was arrested for assaulting victim Antonio Biginao on May 24, just over two weeks after the attack, and two days before Biginao died.

Brown was charged with attempted robbery, assault and burglary — although the charges could be upgraded now that police have ruled Biginao’s death a homicide.

Biginao, 61, was found inside his apartment on West 52nd Street near 10th Avenue at about 5 p.m on May 7, after police were called to perform a wellness check.

He was discovered unresponsive on his living room floor with head trauma, cops said.

Biginao was rushed to Mount Sinai West Hospital with a subdural hematoma, according to court documents. He ended up brain dead and died on May 26, when he was taken off life support.

Cops believe Brown was let into the apartment, although it was not immediately clear how the pair knew each other.

Brown had been escorted from the building by a security guard at about 4:30 a.m. that morning but returned several hours later, according to court documents. Brown told police he was returning to the building for a cellphone.

After the assault, Brown allegedly took off with several of Biginao’s credit cards, officials said.